MC4R and type 2 diabetes mellitus: MC4R rs17782313 significantly predisposes to elevated obesity risk under the recessive and additive models (OR = 1.38, 95% CI: 1.1–1.72, p = 0.005 and OR = 1.1, 95% CI: 1.01–1.2, p = 0.03, respectively) adjusted for confounders (age, sex, T1DM, and T2DM).